Well tool extracting device



H. P. sALvr-:RnAf 2,352,453

WELL TOOL EXTRACTINGl DEVICE Filed April 29, 1942 2 Sheets-Sheet 1L June 27, 1944.

H. P. sALvERDA 2,352,453

wELL TOOL EXTRACTING DEVICE Filed April 29, 1942 2 Sheets-Sheet 2 Jun-e 27., 1944.

Patented June 27, 1944 WELL TOOL EXTRACTING DEVICE I Henry P. Salverda, Daytons BluH Station, Minnu assigner of one-half to Frank J. McCarron and Alice McCarron Loftus, Daytons Bluff Station,

Minn.

Application April 29, 1942, Serial No. 440,890

7 Claims.

My invention relates to an improvement in Well tool extracting device, particularly designed `to remove broken tools and instruments from a well or tubular receptacle.

In the process of digging wells and in operating cation: l

the same, it often happens that a tool or rod be- Figure 1 is a sectional view through a-(well cas-f comes broken oi at a point considerably belowv ing, or the like, showing my extracting device in the surface of the ground, making the broken porposition therein.

tion oi the tool extremely difficult to remove. In Figure 2 is a cross sectional view longitudinally my previous application, Serial Number 420,529, l0 through the upper portion of my extracting defiled November 26, 1941, for Pump rod extracting vice. v

device, I described an instrument suitable for Figure 3 is a view similar to Figure 2,lv the posi'- use in removing pump rods and the like. While tion of the section being on a plane at right anthis device is ex-tremelywell suited for its pregles to the plane of the section in Figure 2.

scribed purpose, it sometimes happens that the kI Figure 4 is a sectional view similar to'Figure 3, tool or rod broken is of small diameter relative to but showing the parts in a different relative re-l the diameter of the well or tubular vcasing in lationship. I Which it iS located- ACCOIdHglY, it is the DUIDOSB Figure 5 is a longitudinal section on a vertical 0f the present invention to xprovide a device Smplane through the lower portion of my extracting lar to my previous construction, but designed for 2c devicef r use in extracting rods of relatively small diam- Figure 6 is a view similar to Figure 5, but showeter if it is deemed advisable, Y ing thev clamping jaws in clamping position.

Y It is a purpose of the present invention to pro- Figure 7 is a cross-sectional view` through the vide a tool or instrument having removable jaws extracting device, the position of the section being which may be of a size to engage a relatively small 25 indicated by the line 'l-l of Figure 2. Y rod or tool. My construction is so designed that Figure 8 is a side elevational view cfa portion even if a short portion of this rod or tool is exof the extracting device, showing the casing of posed my tool will denitely engage the same and the device partly in section. y permit removal thereof. Figure 9 is an elevational view of a jaw which It is an object of the presen-t invention to profi may be used in connection with my device. vide an extracting device including a pair of nor- Figure 10 illustrates a modified form of jaw mally spaced jaws used in combination with a construction. means for contracting the jaws to clamp the same Figure 11 is a vertical section through the View together. This means in preferred form comshown in Figure 10, the position of the section prises a sleeve which is slidableover the jaws to 35 being indicated by the line II-II of Figure 10. draw the-.laws together into engagement With 'the Figure 12 is anelevational view of a modified broken section of the rod or tool. form of jaw construction A feature of the present invention lies in the Figure 13 is a, vertical section through the 'jaw' Provision Ofafrgger Operating mechanism Which shown in Figure 12, the position of the sectionl is Positioned mWardIY 0f the JaWS- AS a' result' 4 being indicated by the line |3-I3 of Figure 12. there is little danger of the trigger being actuated The extracting device A is designed to t wmp to Clamp theefws tegepher um the reef or teel te in a tubular casing B, `such as a well casing, or be clamped 1S m pesmon between ehe Jaws' e the like. The device A includes a tubular hous- A furthe? .feature of the present mYentlon hes 4,., ing l0 having a pair of oppositely disposed elonin the provision of a means for adjusting the pof.

gated slots l l therein. An inverted U-shaped sition of the trigger actuating means with respect 1 t I3 b t .u t t d F. 3 ,d4 ftothe jaws. Thus, if a long section of rod is to e emen v es, 1 us Fa e n.1 lgures al? o be extracted, the trigger may be set so that a conthe drawings 1S provlded Wlthm ,the easmg Ie'- siderebie iength of rod will pass between the This U-Shaled Sudam@ element '-3 mcludes a pall jaws before the clamping action takes p1ace on 50 of opposed sides I4 connected by a top connecting the other hand, if the broken section is relatively member |5- This U-Shaped Slidable bracket I3 short the trigger operating means may be set supports a pair of tongues I6 extending upwardly Close to ,the jaws so as to Clamp the jaws tofrom a cylindrical sleeve I1. Bolts I9 or other gether as soon as the same has passed between suitable meansconnect the tongue i6 to the U-v lihe jaws. 552

These and other objects and novel features of my invention will be more clearly andfully set forth in the following specication and claims.

In the drawings forming a part of my speeld- A shaped slidable member i4 so that the sleeve |11 slides longitudinally of the casing I Il together with the inverted U-shaped bracket I3.

A pair of springs 2'0 are provided within the cylindrical casing I0. One end of each of the springs is anchored at 2| to the casing I0. The other end of each spring 20 is hooked at 22 onto the sides of the cross member I5 of the bracket I 3; These' springs 20 normally tend to pull the slidable bracket I3 downwardly, thus moving the sleeve I1 downwardly with respect to the casing I0.

A means is provided to hold the U-shaped bracket I3 in an elevated position with respect to the casing I6 when it is so desired. A rod 23 extends through the connecting member' I5 of the bracket I3 and is adjustably supported in position by nuts 24. A portion tof the shaft is of reduced diameter providing a shoulder 26 in the rod. This shoulder is designed to engage a trigger lever which will now be described in detail.

A bearing wall 21, provided with a cylindrical s kirt29, is provided within the casing I0 near the upper extremity thereof. Bolts 39 extend through the casing I0 and to the skirt 29 to hold the wall 21 in place. The upper extremityof the rod 25 extends through this wall and is slidably supported thereby.

As best illustrated in Figure '7 of the drawings,

a trigger lever 3| is pivoted at32 to the wall 21 and is urged againstA the rod 23 by means of a spring 33. When the bracket |31 is slidably moved upwardly with respect to the casing I0 until the rod 23 extends through the wall 21 a suicient distance, the trigger 32 engages the shoulder 26 andprevents the springs 20 from pulling the bracket I3 downwardly into the positionshown in Figure 6 of the drawings. In other words, when the shoulder 26 is in,v engagement with the lever 3|as illustrated in Figure 4 of the drawings, the sleeve I1 is in the elevated position illustrated in Figure 5 of thedrawings.V However, when the shoulder 26 is released from the-trigger 3| the-springs 20 pull the bracket I3 and the sleeve I1 downwardly into the clamping position illustratedin Figure of the drawings.

In order tooperate the lever 3|, I provide a wedge-shaped cam 34 which is supported on the upper extremity of a rod 35.l `When the rod 35.is movedupwardly with respect to the wall 21 the wedge-shaped cam 34 will engage against the'lever 3| to disengage this lever from the shoulder 26. When in the lowered position illustrated in Figures 3,4, andi 81 of the drawings, the, lever 3| may be urged into engagement with theshoulder 26.

vAtthe upper extremity of the casing I 3. I provide an internally threaded nipple 35 Vinto which the reducergl is secured. A tubular extension 39 'extends upwardly from the reduc-er 31 and is closed atits upper extremity with a cap 38. A plunger 40 is slidable between limits Within the extension 39. This plunger 45 is adaptable for ,engagement :with an actuating rod or'acable4I.

`With reference new to Figures 5 and 6 of the drawings, it will benoted that a U-shape'd support 4I is secured within the tubular casing Il at the lower extremity thereof. 'The support or bracket 4I includes a pair 'of opposed sides v4 2 connected by a -connectingelement 4&3. Bolts 44 secure the bracket sides 42 vto theV lower extremity of the casing III. Bolts 45 lconnect the vsides 42 of the bracket 4I 'with extension arms 46. These arms lll'fter'minate in a pairof Aparallelvjournals 41 supported inspaced relation.' `A` U-sliaped con- ,beneath this cross member 43.

necting element 49 is secured between the arms 46 by bolts 50 to form a journal for the trigger operating rod, as will be later pointed out in detail.

A pair of elongated arms 5| are pivotally secured` by pivots 52 to the journals 41. Springs 53 secured to the arms 5| at 54 ktend, to hold the arms normally spread apart. VThe arms 5| extend through the sleeve I1, 'as shown in the drawings.

The trigger operating rod 35 passes through the U-shaped connecting bracket 4| at its base 43 and an enlarged cup 55 encircles the rod 35 A spring 56 is interposed between the cup 55 and the bottom of 'the cross connecting portion 43 of the bracket 4I. The elevation position of the rod 35, in which position. the wedge-shaped cam 34 is operated to disengage the trigger lever 3|, the cup 55 is positioned more closely adjacent the cross member 43 than would otherwise be the case. The spring 56 tends `to lower the cam 34 when the rod is not held in elevated position.

The rod 35 is threaded at its lower extremity to engage into a socket 51 on the upper extremity of a rod 59. The rod 59 is secured to a tubular element kIIl which extends downwardly therefrom and is arranged in telescopic relation to the rod 6I. A set screw 62 through the tubular element 69 holds the rod 6I in adjusted position. A disc or plate 53 is provided on the lower extremity of the rod 6I fer engagement with the broken section of a rod or tool within the well casing B.

In operation the device A is lowered into the well casing B, either by rigid means, such as rods, or by a cable such as 4 I. The lowering action continues until a pump rod or tool, indicated in general by the letter C, passesbetween the jaws 64 on the lower extremities of the arms 5|. When the element C engages the disc 63 the rod 6I is urged upwardly, carrying the tubular element Bil and the rod 59 therewith.. This movement compresses the spring 55 and urges the rod 35 upwardly, thus raising the wedge-shaped cam 34 and releasing the trigge lever 3| from the shoulder 26. The springs 20 then slide the bracket I3 downwardly, the'sleeve I1 sliding downwardly over the arms 5I and pivoting them together. The jaws 64 are clampedr against the drill rod or tool by this movement.

Figure 9 illustrates one ofthe jaws 64 removed from 'its arm 5I. The jaws 64 are held in place by a pair of bolts 65 or other suitable means which extend into threaded openings 66 in the jaws ,64. VThe. inner surface of the jaws are threaded or transversely grooved as illustrated at 61, so that the instruments engaged will not slip with respect to the jaws.

I'n Figures 10 and 11 of the drawings, I disclose another construction of jaw 69, which may be used on the ends of the .arms 5I in place of' the jaw 64. The jaw 69 is similar to the jaw 64 with the exception that the aperture 10 between theljaws is relatively small for engagement with a relatively small diameter tool or rod. The lower extremity 1Iof each jaw is conically shaped so` as 'to directl the rod'r tool toward the aperture in the jaw. 'I'hreaded openings 12 are. provided which may engage the bolts 65 to hold the jaws in place. t

In Figures 12 and 13 of the drawings, I disclose another type of ja'w which maybe used in place 'of either of the jaws illustrated. The construction described n Figures 12 and 13 discloses an elongated body 13, provided with a pair oi' apertures 'I at one end thereof for engagement with the lbolts 65. An inwardly extending prong 14 is provided in the lower end of each body por-- tion i3 for engagement into the body of the element being engaged. These prongs 'l5 form a hook which is extremely desirable in some instances.

In accordance with the patent statutes, I have described the principles of construction and operation of my device, and while I have endeavored to set forth the vbest embodiments thereof, I desire to have it understood that obvious changes maybe made within the scope of the following claims without departing from the spirit of my invention.

I claim:

1. A rod extracting device for extracting a rod or the like from an elongated tubular casing, the extractor comprising a body designed to iit within said tubular casing, a pair of opposed arms pivoted to said body and projecting downwardly therefrom, a sleeve encircling said arms, means slidably connecting said sleeve to said body and movable between two extreme positions, said sleeve in one extreme position allowing said arms to spread and pivoting said arms together upon movement toward the other extreme position, jaw means on said arms to clamp a rod or the like therebetween as said arms are pivoted together, and spring means urging said sleeve toward said other extreme position.

2. A rod extracting device for extracting a rod or the like from an elongated tubular casing, the extractor comprising a body designed to iit within said tubular casing, a pair of opposed arms pivoted to said body and projecting downwardly therefrom, a sleeve encircling said arms, means slidably connecting said sleeve to said body and movable between two extreme positions, said sleeve in one extreme position allowing said arms to spread and pivoting said arms together upon movement toward the other extreme position, jaw means on said arms to clamp a rod therebetween as said arms are pivoted together, trigger means holding said sleeve in said one extreme position, and spring means urging said sleeve toward said other extreme position.

3. A rod extracting device for extracting a rod or the like from an elongated tubular casing, the extractor comprising a body designed to fit within said tubular casing, a pair of opposed arms pivoted to said body and projecting downwardly therefrom, a sleeve encircling said arms, means slidably connecting said sleeve to said body and movable between two extreme positions, said sleeve in one extreme position allowing said arms to spread and pivoting said arms together upon movement toward the other extreme position, jaw means on said arms to clamp a rod therebetween as said arms are pivoted together, trigger means holding said sleeve in said one extreme position, spring means urging said sleeve toward said other extreme position, and trigger release means engageable with the rod when between said jaws.

4. A rod extracting device for extracting a rod or the like from an elongated tubular casing, the extractor comprising a body designed to fit within said tubular casing, a pair of opposed arms pivoted to said body and projecting downwardly therefrom, a sleeve encircling said arms, means slidably connecting said sleeve to said body and movable between two extreme positions, said sleeve in one extreme position allowing said arms l to spread and pivoting said arms together upon movement toward the other extreme position, jaw means on said arms to clamp a rod therebetween as said arms are pivoted together, trigger means holding said sleeve in one extreme position, spring means urging said sleeve toward the other extreme position, means normally urging said arms apart, and trigger release means engageable with said trigger to release the same, said release means engageable with the rod between said jaws.

5. A rod extracting device for use in'extractand engageable with the rod when between said arms for controlling movement of said encirclin-"g means. v

6. A rod extracting device for use in extracting a rod or the like from an elongated tubular casing, the extractor comprising a body designed to fit within said casing, a plurality of arms pivoted to said body and extending downwardly therefrom, means normally urging said arms apart, means encircling said arms and slidably supported with respect to said body, said encircling means in one position allowing said arms to spread, and operable upon a sliding movement to clamp said arms together, resilient means urging said encircling means into position to clamp said arms together, and trigger means actuated y by said rod when between said arms for controllingmovement of said encircling means.

'7. A rod extracting device for use in extracting a rod or the like from an elongated tubularl casing, the extractor comprising a body designed to t within said casing, a plurality of arms pivoted to said body and extending downwardly therefrom, means normally urging said arms apart, means encircling said arms and slidably supported with respect to said body, said encircling means in one position allowing said arms to spread and operable upon a sliding movement to clamp said arms together, resilient means urging said encircling means into position to clamp said arms together, trigger means engageable with the rod when between said arms for controlling movement of said encircling means, and removable jaws mounted on said arms.

' HENRY P. SALVERDA. 

